Jesterile

Jester.
Sterile.
Jesterile.

Sometimes something will make you laugh so hard that you can't have kids.

Like a knee-slapper, but for your genitals.

Forego.
Gonads.
Foregonads.

Macaronin

Macaroni.
Ronin.
Macaronin.

A wandering pasta in feudal Japan that has no lord or master.

Udon.
On its own.
Udon its own.

UFOMO

UFO.
FOMO.
UFOMO.

Sometimes when aliens visit earth, they have a limited amount of time and have to make choices about which humans to abduct and perform experiments on, and it can be difficult to realize that they might not get a chance to probe every specimen they want to.

Specimen.
Many.
Specimany/space-men-y.

Overpopulation is a problem that extends even beyond the overpopulated planet. Let's make things easier for these aliens to do everything they want to us, okay?

If you have fewer children, there's less chance that your children will be abducted and probed. It's math!

Anal.
Algebra.
Analgebra.

Narwhalitosis

Narwhal.
Halitosis.
Narwhalitosis.

A sea creature with bad breath.

Which makes sense because it probably eats stuff that's in the ocean, which is basically like eating out of ALL of the toilets.

Bidet.
Detritus.
Bidetritus.

Velcroissant

Velcro.
Croissant.
Velcroissant.

Wouldn't it be great if you could eat a pastry but then easily remove it from your insides?

Also if it made a really satisfying sound when you removed it?

Sonic.
Nice.
Sonice/so nice.

Propagandalf

Propaganda.
Gandalf.
Propagandalf.

Wizards are the best.

Snape.
Apex.
Snapex.

Twords

Two.
Words.
Twords.

Two words move onwards (one-wards) towards one word.

Convergent.
Entirely.
Convergentirely.